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/*
* Copyright 2014 Cisco Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef __SNIC_TRC_H
#define __SNIC_TRC_H
#ifdef CONFIG_SCSI_SNIC_DEBUG_FS
extern ssize_t simple_read_from_buffer(void __user *to,
size_t count,
loff_t *ppos,
const void *from,
size_t available);
extern unsigned int snic_trace_max_pages;
/* Global Data structure for trace to manage trace functionality */
struct snic_trc_data {
u64 ts; /* Time Stamp */
char *fn; /* Ptr to Function Name */
u32 hno; /* SCSI Host ID */
u32 tag; /* Command Tag */
u64 data[5];
} __attribute__((__packed__));
#define SNIC_TRC_ENTRY_SZ 64 /* in Bytes */
struct snic_trc {
spinlock_t lock;
struct snic_trc_data *buf; /* Trace Buffer */
u32 max_idx; /* Max Index into trace buffer */
u32 rd_idx;
u32 wr_idx;
bool enable; /* Control Variable for Tracing */
struct dentry *trc_enable; /* debugfs file object */
struct dentry *trc_file;
};
int snic_trc_init(void);
void snic_trc_free(void);
int snic_trc_debugfs_init(void);
void snic_trc_debugfs_term(void);
struct snic_trc_data *snic_get_trc_buf(void);
int snic_get_trc_data(char *buf, int buf_sz);
int snic_debugfs_init(void);
void snic_debugfs_term(void);
static inline void
snic_trace(char *fn, u16 hno, u32 tag, u64 d1, u64 d2, u64 d3, u64 d4, u64 d5)
{
struct snic_trc_data *tr_rec = snic_get_trc_buf();
if (!tr_rec)
return;
tr_rec->fn = (char *)fn;
tr_rec->hno = hno;
tr_rec->tag = tag;
tr_rec->data[0] = d1;
tr_rec->data[1] = d2;
tr_rec->data[2] = d3;
tr_rec->data[3] = d4;
tr_rec->data[4] = d5;
tr_rec->ts = jiffies; /* Update time stamp at last */
}
#define SNIC_TRC(_hno, _tag, d1, d2, d3, d4, d5) \
do { \
if (unlikely(snic_glob->trc.enable)) \
snic_trace((char *)__func__, \
(u16)(_hno), \
(u32)(_tag), \
(u64)(d1), \
(u64)(d2), \
(u64)(d3), \
(u64)(d4), \
(u64)(d5)); \
} while (0)
#else
#define SNIC_TRC(_hno, _tag, d1, d2, d3, d4, d5) \
do { \
if (unlikely(snic_log_level & 0x2)) \
SNIC_DBG("SnicTrace: %s %2u %2u %llx %llx %llx %llx %llx", \
(char *)__func__, \
(u16)(_hno), \
(u32)(_tag), \
(u64)(d1), \
(u64)(d2), \
(u64)(d3), \
(u64)(d4), \
(u64)(d5)); \
} while (0)
#endif /* end of CONFIG_SCSI_SNIC_DEBUG_FS */
#define SNIC_TRC_CMD(sc) \
((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 | \
(u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 | \
(u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 | \
(u64)sc->cmnd[5])
#define SNIC_TRC_CMD_STATE_FLAGS(sc) \
((u64) CMD_FLAGS(sc) << 32 | CMD_STATE(sc))
#endif /* end of __SNIC_TRC_H */
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